See also:

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Switch over between the display screens. Radio stations or TV channels are grayed out ...

Supplementary text messages
You can call up more information, e.g., on the cause of a malfunction and on how to respond, via Check Control. In urgent cases, this information will be shown as soon as the corresponding lamp ...

Maintaining/storing the speed
Press the button. or: Press the rocker switch while the system is interrupted. When the system is switched on, the current speed is maintained and stored as the desired speed. It is d ...